diff --git a/EInAPI.h b/EInAPI.h
index a8a0b25..6ad68ba 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -118,6 +118,7 @@ EIN_EXPORT BOOL __stdcall EgtAdvancedImport( const wchar_t* wsFilePath, double d
 EIN_EXPORT BOOL __stdcall EgtExportDxf( int nId, const wchar_t* wsFilePath, int nFlag, int nFilter) ;
 EIN_EXPORT BOOL __stdcall EgtExportStl( int nId, const wchar_t* wsFilePath, int nFilter) ;
 EIN_EXPORT BOOL __stdcall EgtExport3MF( int nId, const wchar_t* wsFilePath, int nFilter) ;
+EIN_EXPORT BOOL __stdcall EgtExport3dm( int nId, const wchar_t* wsFilePath, int nFilter) ;
 EIN_EXPORT BOOL __stdcall EgtExportSvg( int nId, const wchar_t* wsFilePath, int nFilter) ;
 EIN_EXPORT BOOL __stdcall EgtSetThreeJSLibDir( const wchar_t* wsThreeJSLibDir) ;
 EIN_EXPORT BOOL __stdcall EgtExportThreeJS( int nId, const wchar_t* wsFilePath, int nFilter) ;